Use the Product Rule to Multiply $\sqrt { 14 x } \cdot \sqrt { 11 y }$

Multiple Choice

Use the product rule to multiply. Assume all variables represent positive real numbers.
- $\sqrt { 14 x } \cdot \sqrt { 11 y }$

A) $\sqrt { 14 \mathrm { x } + 11 \mathrm { y } }$
B) $\sqrt { 154 x y }$
C) $\sqrt { 25 x y }$
D) $154 x y$